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-rw-r--r--js/src/frontend/BytecodeEmitter.cpp64
1 files changed, 39 insertions, 25 deletions
diff --git a/js/src/frontend/BytecodeEmitter.cpp b/js/src/frontend/BytecodeEmitter.cpp
index 7582e8df1..c2eae4344 100644
--- a/js/src/frontend/BytecodeEmitter.cpp
+++ b/js/src/frontend/BytecodeEmitter.cpp
@@ -4603,7 +4603,7 @@ BytecodeEmitter::emitSwitch(ParseNode* pn)
// If the expression is a literal, suppress line number emission so
// that debugging works more naturally.
if (caseValue) {
- if (!emitTree(caseValue,
+ if (!emitTree(caseValue, ValueUsage::WantValue,
caseValue->isLiteral() ? SUPPRESS_LINENOTE : EMIT_LINENOTE))
{
return false;
@@ -6652,7 +6652,7 @@ BytecodeEmitter::emitLexicalScopeBody(ParseNode* body, EmitLineNumberNote emitLi
}
// Line notes were updated by emitLexicalScope.
- return emitTree(body, emitLineNote);
+ return emitTree(body, ValueUsage::WantValue, emitLineNote);
}
// Using MOZ_NEVER_INLINE in here is a workaround for llvm.org/pr14047. See
@@ -6754,9 +6754,9 @@ BytecodeEmitter::emitRequireObjectCoercible()
return false;
if (!emit2(JSOP_PICK, 2)) // VAL REQUIREOBJECTCOERCIBLE UNDEFINED VAL
return false;
- if (!emitCall(JSOP_CALL, 1)) // VAL IGNORED
+ if (!emitCall(JSOP_CALL_IGNORES_RV, 1))// VAL IGNORED
return false;
- checkTypeSet(JSOP_CALL);
+ checkTypeSet(JSOP_CALL_IGNORES_RV);
if (!emit1(JSOP_POP)) // VAL
return false;
@@ -7276,12 +7276,14 @@ BytecodeEmitter::emitCStyleFor(ParseNode* pn, EmitterScope* headLexicalEmitterSc
// scope, but we still need to emit code for the initializers.)
if (!updateSourceCoordNotes(init->pn_pos.begin))
return false;
- if (!emitTree(init))
- return false;
-
- if (!init->isForLoopDeclaration()) {
+ if (init->isForLoopDeclaration()) {
+ if (!emitTree(init))
+ return false;
+ } else {
// 'init' is an expression, not a declaration. emitTree left its
// value on the stack.
+ if (!emitTree(init, ValueUsage::IgnoreValue))
+ return false;
if (!emit1(JSOP_POP))
return false;
}
@@ -7363,7 +7365,7 @@ BytecodeEmitter::emitCStyleFor(ParseNode* pn, EmitterScope* headLexicalEmitterSc
if (!updateSourceCoordNotes(update->pn_pos.begin))
return false;
- if (!emitTree(update))
+ if (!emitTree(update, ValueUsage::IgnoreValue))
return false;
if (!emit1(JSOP_POP))
return false;
@@ -8690,8 +8692,9 @@ BytecodeEmitter::emitStatement(ParseNode* pn)
if (useful) {
JSOp op = wantval ? JSOP_SETRVAL : JSOP_POP;
+ ValueUsage valueUsage = wantval ? ValueUsage::WantValue : ValueUsage::IgnoreValue;
MOZ_ASSERT_IF(pn2->isKind(PNK_ASSIGN), pn2->isOp(JSOP_NOP));
- if (!emitTree(pn2))
+ if (!emitTree(pn2, valueUsage))
return false;
if (!emit1(op))
return false;
@@ -9041,7 +9044,7 @@ BytecodeEmitter::emitOptimizeSpread(ParseNode* arg0, JumpList* jmp, bool* emitte
}
bool
-BytecodeEmitter::emitCallOrNew(ParseNode* pn)
+BytecodeEmitter::emitCallOrNew(ParseNode* pn, ValueUsage valueUsage /* = ValueUsage::WantValue */)
{
bool callop = pn->isKind(PNK_CALL) || pn->isKind(PNK_TAGGED_TEMPLATE);
/*
@@ -9220,13 +9223,20 @@ BytecodeEmitter::emitCallOrNew(ParseNode* pn)
}
if (!spread) {
- if (!emitCall(pn->getOp(), argc, pn))
- return false;
+ if (pn->getOp() == JSOP_CALL && valueUsage == ValueUsage::IgnoreValue) {
+ if (!emitCall(JSOP_CALL_IGNORES_RV, argc, pn))
+ return false;
+ checkTypeSet(JSOP_CALL_IGNORES_RV);
+ } else {
+ if (!emitCall(pn->getOp(), argc, pn))
+ return false;
+ checkTypeSet(pn->getOp());
+ }
} else {
if (!emit1(pn->getOp()))
return false;
+ checkTypeSet(pn->getOp());
}
- checkTypeSet(pn->getOp());
if (pn->isOp(JSOP_EVAL) ||
pn->isOp(JSOP_STRICTEVAL) ||
pn->isOp(JSOP_SPREADEVAL) ||
@@ -9324,12 +9334,13 @@ BytecodeEmitter::emitLogical(ParseNode* pn)
}
bool
-BytecodeEmitter::emitSequenceExpr(ParseNode* pn)
+BytecodeEmitter::emitSequenceExpr(ParseNode* pn,
+ ValueUsage valueUsage /* = ValueUsage::WantValue */)
{
for (ParseNode* child = pn->pn_head; ; child = child->pn_next) {
if (!updateSourceCoordNotes(child->pn_pos.begin))
return false;
- if (!emitTree(child))
+ if (!emitTree(child, child->pn_next ? ValueUsage::IgnoreValue : valueUsage))
return false;
if (!child->pn_next)
break;
@@ -9392,7 +9403,8 @@ BytecodeEmitter::emitLabeledStatement(const LabeledStatement* pn)
}
bool
-BytecodeEmitter::emitConditionalExpression(ConditionalExpression& conditional)
+BytecodeEmitter::emitConditionalExpression(ConditionalExpression& conditional,
+ ValueUsage valueUsage /* = ValueUsage::WantValue */)
{
/* Emit the condition, then branch if false to the else part. */
if (!emitTree(&conditional.condition()))
@@ -9402,13 +9414,13 @@ BytecodeEmitter::emitConditionalExpression(ConditionalExpression& conditional)
if (!ifThenElse.emitCond())
return false;
- if (!emitTreeInBranch(&conditional.thenExpression()))
+ if (!emitTreeInBranch(&conditional.thenExpression(), valueUsage))
return false;
if (!ifThenElse.emitElse())
return false;
- if (!emitTreeInBranch(&conditional.elseExpression()))
+ if (!emitTreeInBranch(&conditional.elseExpression(), valueUsage))
return false;
if (!ifThenElse.emitEnd())
@@ -10288,7 +10300,8 @@ BytecodeEmitter::emitClass(ParseNode* pn)
}
bool
-BytecodeEmitter::emitTree(ParseNode* pn, EmitLineNumberNote emitLineNote)
+BytecodeEmitter::emitTree(ParseNode* pn, ValueUsage valueUsage /* = ValueUsage::WantValue */,
+ EmitLineNumberNote emitLineNote /* = EMIT_LINENOTE */)
{
JS_CHECK_RECURSION(cx, return false);
@@ -10410,7 +10423,7 @@ BytecodeEmitter::emitTree(ParseNode* pn, EmitLineNumberNote emitLineNote)
break;
case PNK_COMMA:
- if (!emitSequenceExpr(pn))
+ if (!emitSequenceExpr(pn, valueUsage))
return false;
break;
@@ -10432,7 +10445,7 @@ BytecodeEmitter::emitTree(ParseNode* pn, EmitLineNumberNote emitLineNote)
break;
case PNK_CONDITIONAL:
- if (!emitConditionalExpression(pn->as<ConditionalExpression>()))
+ if (!emitConditionalExpression(pn->as<ConditionalExpression>(), valueUsage))
return false;
break;
@@ -10545,7 +10558,7 @@ BytecodeEmitter::emitTree(ParseNode* pn, EmitLineNumberNote emitLineNote)
case PNK_CALL:
case PNK_GENEXP:
case PNK_SUPERCALL:
- if (!emitCallOrNew(pn))
+ if (!emitCallOrNew(pn, valueUsage))
return false;
break;
@@ -10703,12 +10716,13 @@ BytecodeEmitter::emitTree(ParseNode* pn, EmitLineNumberNote emitLineNote)
}
bool
-BytecodeEmitter::emitTreeInBranch(ParseNode* pn)
+BytecodeEmitter::emitTreeInBranch(ParseNode* pn,
+ ValueUsage valueUsage /* = ValueUsage::WantValue */)
{
// Code that may be conditionally executed always need their own TDZ
// cache.
TDZCheckCache tdzCache(this);
- return emitTree(pn);
+ return emitTree(pn, valueUsage);
}
static bool
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 17:53:12 +0000